<div class="search_cond" style="display: block;">
    <div class="lupa"></div>
    <?php foreach ($filtros_activos as $filtro): ?>
        <span class="filtro_activo">
            <strong><?php echo $filtro[0]; ?></strong>: 
            <?php echo $filtro[1]; ?>
        </span>
    <?php endforeach; ?>
</div>